When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.
Advisories
Source ID Title
Debian DSA Debian DSA DSA-6514-1 php8.4 security update
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 25 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 25 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Description When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.
Title Out-of-bounds read in the HTTP stream wrapper when following a redirect with an empty Location header
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: php

Published:

Updated: 2026-09-25T20:38:14.346Z

Reserved: 2026-09-18T14:18:02.748Z

Link: CVE-2026-93682

cve-icon Vulnrichment

Updated: 2026-09-25T20:38:08.147Z

cve-icon NVD

Status : Received

Published: 2026-09-25T20:17:47.597

Modified: 2026-09-25T21:17:25.047

Link: CVE-2026-93682

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-25T22:00:20Z

Weaknesses